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Scarab Guide Links
(goes to the University of Nebraska
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Tesserodoniella elguetai Vaz de Mello and Halftter
Tesserodoniella elguetai Vaz de Mello and Halftter 2006:63. |
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Tesserodoniella elguetai,
head.
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Tesserodoniella elguetai,
parameres. |
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Map of central Chile showing distribution of Tesserodoniella elguetai (circles)
and T. meridionalis (triangles). |
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Holotype:
male. CHILE: Región Metropolitana de Santiago: Maipo, Rangue, 5-11 June 2004, M. E
lgueta & M. Guerrero leg., "trampa barber, bosque higrófilo + esclerófilo" (MNNC). |
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Paratypes:
4 males, 4 females. CHILE: Región Metropolitana de Santiago: same as holotype except "bajo
excrementos de caballo, suelo arcillo arenoso" (1 female FVMC, female MNNC, 1 female UNSM); Maipo,
Rangue, 2-8 August 2000, A. Fierro leg., barber trap. (1 male GVHC); SW Santiago, Alto
Cantillana, Alhué, 3 September 2000, Vidal leg. (1 male, 1 female PVC); Cachapoal, R. N.
Roblerías de Loncha, 20-XI-2004, J. Mondaca, "en trampa barber" (1 male JMEC, 1 male
CMNC). |
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Etymology:
A patronym honoring Mario Elgueta, MNNC, Santiago, Chile, who kindly offered
specimens of both species of this genus for study. |
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Description:
Holotype male. Head (Fig. 1) clypeus with two narrow, parallel-sided, elongated teeth;
teeth separated by short, wide U-shaped emargination, each tooth with external angulate
lobe. Dorsal eye surface reduced, triangular, visible only when head protracted; interocular
dorsal region wider than 20 times one eye width. Prothorax subrectangular, almost twice
as wide as long medially. Medium longitudinal line feebly indicated in posterior half by
impunctate region. Posterior angles obtusely rounded. Elytra with discal striae
conspicuous. Interstriae without discal tubercles, with two irregular rows of inconspicuous
punctures; some punctures with short, erect setae; punctures and setae denser apically.
Lateral carina sharp, juxtaposed and external to seventh stria, extended from elytral base to
just before apex of sixth stria. Legs with protibia internally curved; external border
with 3 well-defined teeth, narrower apically; internally with strong apical tooth, tooth
anteroventrally directed. Metafemur with posterior, ventral carina forming
rounded lobe in median third; with acute subapical lobe. Metatibia with external row of
five conspicuous serrations. Venter with mesosternum twice as long as wide. Pygidium
basal sulcus with obtusely rounded, median angle. Parameres (Fig. 4) as long as twothirds
of phallobase. |
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Variation:
Paratypes vary in size (5.1-6.0 mm) and width (widest at prothorax) 3.0-3.3 mm.
Females differ from males in the following respects: protibial teeth wider and stronger, apical internal tooth almost lacking; hind femur with posterior apical lobe rounded;
metatibia straighter, widened apically, with less conspicuous external serrations;
abdominal ventrite 5 feebly narrowed medially. |
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Remarks:
All specimens are from the Cordillera de la Costa mountain system close to the
Central Chilean Coast, parallel to the Andes (see map). Apart from anthropogenic habitats,
the area has dry savannas and sclerophyllous, hygrophyllous, and Nothofagus forests. This
area is within the Santiago Biogeographical Province as defined by Morrone (2001, 2006). |
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Excerpt from:
Vaz de Mello, F. Z., G. Halffter. 2006. A new dung beetle genus with two new species from Chile
(Coleoptera: Scarabaeidae: Scarabaeinae). Zootaxa 1193: 59-68 |
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